EP 2051370 A3 20100609 - RF power amplifier apparatus and power supply circuit for controlling power-supply voltage to RF power amplifier
Title (en)
RF power amplifier apparatus and power supply circuit for controlling power-supply voltage to RF power amplifier
Title (de)
RF-Stromverstärkervorrichtung und Stromversorgungskreis zur Steuerung der Stromversorgungsspannung an einen RF-Stromverstärker
Title (fr)
Appareil amplificateur de puissance RF et circuit d'alimentation électrique pour contrôler la tension d'alimentation électrique d'un amplificateur de puissance RF
Publication
Application
Priority
JP 2007269160 A 20071016
Abstract (en)
[origin: EP2051370A2] The RF power amplifier apparatus has an RF power amplifier (RFPA) and a power-supply circuit (Pwr_Cnt). The power-supply circuit controls the level of a source voltage (V LDO ) supplied to the RF power amplifier in response to the level of a power-control signal (Vapc). A sensing resistance (Rsen) produces a sense signal (Vsen) corresponding to a source current (I LDO ) with respect to a source voltage. A current-control unit (Cmp1,Cmp2,FF1,NAND3 and Qp4) controls the source current (I LDO ) in response to the sense signal (Vsen). When Vsen coincides with an allowable sense signal level (Vsh) corresponding to a source current allowable level I LDO (Max), the current-control unit controls the source current (I LDO ) to a limit current smaller than the allowable level I LDO (Max). Preferably, the limit current is a shutdown current when a shutdown switch is in OFF state. Thus, the drain of the battery of a mobile-phone terminal can be reduced even when an impedance mismatch condition lasts for a long time.
IPC 8 full level
H03F 1/02 (2006.01)
CPC (source: EP US)
H03F 1/0216 (2013.01 - EP US); H03F 3/24 (2013.01 - EP US); H03F 2200/408 (2013.01 - EP US); H03F 2200/451 (2013.01 - EP US); H03F 2200/504 (2013.01 - EP US); H03F 2200/78 (2013.01 - EP US)
Citation (search report)
- [XA] WO 2006049800 A2 20060511 - SKYWORKS SOLUTIONS INC [US], et al
- [IA] WO 03073603 A2 20030904 - ERICSSON INC [US], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
EP 2051370 A2 20090422; EP 2051370 A3 20100609; EP 2051370 B1 20141210; CN 101414806 A 20090422; CN 101414806 B 20130605; JP 2009100197 A 20090507; JP 5136834 B2 20130206; US 2009096531 A1 20090416; US 2011032038 A1 20110210; US 7839218 B2 20101123; US 8018287 B2 20110913
DOCDB simple family (application)
EP 08253219 A 20081002; CN 200810149907 A 20081015; JP 2007269160 A 20071016; US 25190008 A 20081015; US 90641710 A 20101018